@misc{WM_1898_2_3-4_a7,
     title = {Kronika},
     journal = {Wiadomo\'sci Matematyczne},
     pages = {167--172},
     year = {1898},
     volume = {2},
     number = {3-4},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/WM_1898_2_3-4_a7/}
}